Seasonal variation in the condition index, meat yield and biochemical composition of the flat oysterOstrea edulis(Linnaeus, 1758) from the Dardanelles, Turkey

Abstract

This study was conducted in Dardanelles between October 2007 and August 2009 when condition index, meat yield, biochemical compositions and environmental parameters of seawater were investigated and the study area was found to have available conditions for cultivation. Investigation of the study area showed a positive correlation in particular among condition index, seasonal variation of temperature, protein, fat and chlorophyll-a; a negative correlation was seen between them and carbohydrate value. It was clear from the two years study that the most ideal period for oyster harvest is April and August especially when condition index was maximum followed by a winter with no oyster yield is available in terms of the related processes involving oyster cultivation.

Seasonal variation in reproductive activity and biochemical composition of flat oyster (<em>Ostrea edulis</em>) in the Homa Lagoon, Izmir Bay, Turkey

“…In this study, MY and CI ranged from 2.69% to 12.29% and from 5.21% to 20.42%, respectively. Meat yield and CI of O. edulis in the present study was similar to the values reported for the same species by Acarli et al (2011) and Yıldız et al (2011) in Turkey and by Pogoda et al (2011) in Germany. Based on the AFNOR index for MY values recorded in this study, the oysters could be ranked as "spéciale" according to the classifications given by Soletchnik et al (2001).…”

Flat oysters on offshore wind farms : opportunities for the development of flat oyster populations on existing and planned wind farms in the Dutch section of the North Sea

“…Hatchery studies have shown that 1.68 μg/l is the optimal concentration for reproduction (Millican & Helm, 1994). Effective growth is achieved as soon as the available concentration exceeds 0.5 µg/l (Yildiz et al, 2011). As shown in Figure 4.1.5, shallow waters contain more nutrients than deeper offshore waters, but enough food can be found even there.…”

Platte oesters in offshorewindparken (POP)

“…Uit hatchery-onderzoek blijkt dat voor voortplanting 1,68 μg/l optimaal is (Millican & Helm (1994). Goede groei wordt bereikt wanneer er > 0.5 µg/l aanwezig is (Yildiz et al, 2011). Figuur 4.1.5. laat zien dat ondiepere wateren meer voedsel bevatten dan offshore, maar dat ook daar voldoende voedsel aanwezig is.…”